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julia-glimpse.html
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<!DOCTYPE html>
<html lang="en"><head>
<script src="julia-glimpse_files/libs/clipboard/clipboard.min.js"></script>
<script src="julia-glimpse_files/libs/quarto-html/tabby.min.js"></script>
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<meta charset="utf-8">
<meta name="generator" content="quarto-1.3.272">
<meta name="author" content="Camilo García-Botero">
<title>A glimpse into Julia</title>
<meta name="apple-mobile-web-app-capable" content="yes">
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<div class="reveal">
<div class="slides">
<section id="title-slide" class="quarto-title-block center"><h1 class="title">A glimpse into <code>Julia</code>
</h1>
<p class="subtitle">Join the slides at https://bit.ly/3FutJvK</p>
<div class="quarto-title-authors">
<div class="quarto-title-author">
<div class="quarto-title-author-name">
Camilo García-Botero <a href="https://orcid.org/0000-0002-0426-7007" class="quarto-title-author-orcid"> <img src="data:image/png;base64,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"></a>
</div>
<div class="quarto-title-author-email">
<a href="mailto:[email protected]">[email protected]</a>
</div>
</div>
</div>
</section><section><section id="the-julia-manifest" class="title-slide slide level1 smaller center"><h1>The Julia Manifest</h1>
<blockquote>
<p>It is multi-paradigm, combining features of imperative, functional, and object-oriented programming. Julia provides ease and expressiveness for high-level numerical computing, in the same way as languages such as R, MATLAB, and Python, but also supports general programming. To achieve this, Julia builds upon the lineage of mathematical programming languages, but also borrows much from popular dynamic languages, including <a href="https://en.wikipedia.org/wiki/Lisp_(programming_language)">Lisp</a>, <a href="https://en.wikipedia.org/wiki/Perl_(programming_language)">Perl</a>, <a href="https://en.wikipedia.org/wiki/Python_(programming_language)">Python</a>, <a href="https://en.wikipedia.org/wiki/Lua_(programming_language)">Lua</a>, and <a href="https://en.wikipedia.org/wiki/Ruby_(programming_language)">Ruby</a>.</p>
</blockquote>
</section><section class="slide level2 center"><div class="smaller">
<ul>
<li class="fragment"><p>Free and open source (<a href="https://github.com/JuliaLang/julia/blob/master/LICENSE.md">MIT licensed</a>)</p></li>
<li class="fragment"><p>User-defined types are as fast and compact as built-ins</p></li>
<li class="fragment"><p>No need to vectorize code; devectorized code is fast</p></li>
<li class="fragment"><p>Designed for parallelism and distributed computation</p></li>
<li class="fragment"><p>Lightweight “green” threading (<a href="https://en.wikipedia.org/wiki/Coroutine">coroutines</a>)</p></li>
<li class="fragment"><p>Unobtrusive yet powerful type system</p></li>
<li class="fragment"><p>Extensible conversions and promotions many types</p></li>
<li class="fragment"><p>Support for <a href="https://en.wikipedia.org/wiki/Unicode">Unicode</a>, including but not limited to <a href="https://en.wikipedia.org/wiki/UTF-8">UTF-8</a></p></li>
</ul>
</div>
</section></section><section><section id="juliaup" class="title-slide slide level1 center"><h1>Juliaup</h1>
</section><section id="the-julia-version-manager" class="slide level2 center"><h2>The Julia version manager</h2>
<p>You can get <a href="https://github.com/JuliaLang/juliaup"><code>Juliaup</code></a> and <a href="https://julialang.org/">Julia</a> on Linux or MacOS with:</p>
<div class="sourceCode" id="cb1"><pre class="sourceCode bash code-with-copy"><code class="sourceCode bash"><span id="cb1-1"><a href="#cb1-1" aria-hidden="true" tabindex="-1"></a><span class="ex">curl</span> <span class="at">-fsSL</span> https://install.julialang.org <span class="kw">|</span> <span class="fu">sh</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="fragment">
<p>Or if you are using Windows, simply:</p>
<div class="sourceCode" id="cb2"><pre class="sourceCode bash code-with-copy"><code class="sourceCode bash"><span id="cb2-1"><a href="#cb2-1" aria-hidden="true" tabindex="-1"></a><span class="ex">winget</span> install julia <span class="at">-s</span> msstore</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section><section class="slide level2 center"><p>Now just type <code>julia</code> on the terminal:</p>
<div class="fragment">
<div class="quarto-figure quarto-figure-center">
<figure><p><img data-src="figs/julia-init.png" class="quarto-discovered-preview-image"></p>
</figure>
</div>
</div>
</section></section><section><section id="the-marvelous-repl" class="title-slide slide level1 center"><h1>The marvelous REPL</h1>
</section><section id="the-repl-modes" class="slide level2 center"><h2>The REPL modes</h2>
<p>An integrated package manager <code>Pkg.jl</code></p>
<div class="sourceCode" id="cb3"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb3-1"><a href="#cb3-1" aria-hidden="true" tabindex="-1"></a>julia<span class="op">></span> ] </span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="fragment">
<p>And direct access to <code>bash</code></p>
<div class="sourceCode" id="cb4"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a>julia<span class="op">></span> ;</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<div class="fragment">
<p>The <strong>help</strong> mode right after hitting <code>?</code></p>
<div class="sourceCode" id="cb5"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb5-1"><a href="#cb5-1" aria-hidden="true" tabindex="-1"></a>julia<span class="op">></span> ?</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section><section class="slide level2 center"><div class="sourceCode" id="cb6"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb6-1"><a href="#cb6-1" aria-hidden="true" tabindex="-1"></a>help?<span class="op">></span> map</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="fragment">
<div class="sourceCode" id="cb7"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb7-1"><a href="#cb7-1" aria-hidden="true" tabindex="-1"></a>help?<span class="op">></span> map</span>
<span id="cb7-2"><a href="#cb7-2" aria-hidden="true" tabindex="-1"></a>search<span class="op">:</span> map map! mapfoldr mapfoldl mapslices mapreduce asyncmap asyncmap! macroexpand <span class="pp">@macroexpand</span> <span class="pp">@macroexpand1</span> <span class="pp">@atomicswap</span></span>
<span id="cb7-3"><a href="#cb7-3" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb7-4"><a href="#cb7-4" aria-hidden="true" tabindex="-1"></a> <span class="fu">map</span>(f, c<span class="op">...</span>) <span class="op">-></span> collection</span>
<span id="cb7-5"><a href="#cb7-5" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb7-6"><a href="#cb7-6" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb7-7"><a href="#cb7-7" aria-hidden="true" tabindex="-1"></a> Transform collection c by applying f to each element. For multiple collection arguments, apply f elementwise, and stop when</span>
<span id="cb7-8"><a href="#cb7-8" aria-hidden="true" tabindex="-1"></a> when any of them is exhausted.</span>
<span id="cb7-9"><a href="#cb7-9" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb7-10"><a href="#cb7-10" aria-hidden="true" tabindex="-1"></a> See also map!, foreach, mapreduce, mapslices, zip, <span class="bu">Iterators</span>.map.</span>
<span id="cb7-11"><a href="#cb7-11" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb7-12"><a href="#cb7-12" aria-hidden="true" tabindex="-1"></a> Examples</span>
<span id="cb7-13"><a href="#cb7-13" aria-hidden="true" tabindex="-1"></a> <span class="op">≡≡≡≡≡≡≡≡≡≡</span></span>
<span id="cb7-14"><a href="#cb7-14" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb7-15"><a href="#cb7-15" aria-hidden="true" tabindex="-1"></a> julia<span class="op">></span> <span class="fu">map</span>(x <span class="op">-></span> x <span class="op">*</span> <span class="fl">2</span>, [<span class="fl">1</span>, <span class="fl">2</span>, <span class="fl">3</span>])</span>
<span id="cb7-16"><a href="#cb7-16" aria-hidden="true" tabindex="-1"></a> <span class="fl">3</span><span class="op">-</span>element <span class="dt">Vector</span>{<span class="dt">Int64</span>}<span class="op">:</span></span>
<span id="cb7-17"><a href="#cb7-17" aria-hidden="true" tabindex="-1"></a> <span class="fl">2</span></span>
<span id="cb7-18"><a href="#cb7-18" aria-hidden="true" tabindex="-1"></a> <span class="fl">4</span></span>
<span id="cb7-19"><a href="#cb7-19" aria-hidden="true" tabindex="-1"></a> <span class="fl">6</span></span>
<span id="cb7-20"><a href="#cb7-20" aria-hidden="true" tabindex="-1"></a></span>
<span id="cb7-21"><a href="#cb7-21" aria-hidden="true" tabindex="-1"></a> julia<span class="op">></span> <span class="fu">map</span>(<span class="op">+</span>, [<span class="fl">1</span>, <span class="fl">2</span>, <span class="fl">3</span>], [<span class="fl">10</span>, <span class="fl">20</span>, <span class="fl">30</span>, <span class="fl">400</span>, <span class="fl">5000</span>])</span>
<span id="cb7-22"><a href="#cb7-22" aria-hidden="true" tabindex="-1"></a> <span class="fl">3</span><span class="op">-</span>element <span class="dt">Vector</span>{<span class="dt">Int64</span>}<span class="op">:</span></span>
<span id="cb7-23"><a href="#cb7-23" aria-hidden="true" tabindex="-1"></a> <span class="fl">11</span></span>
<span id="cb7-24"><a href="#cb7-24" aria-hidden="true" tabindex="-1"></a> <span class="fl">22</span></span>
<span id="cb7-25"><a href="#cb7-25" aria-hidden="true" tabindex="-1"></a> <span class="fl">33</span></span>
<span id="cb7-26"><a href="#cb7-26" aria-hidden="true" tabindex="-1"></a><span class="op">...</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</section></section><section><section id="oh-my-beautiful-syntax" class="title-slide slide level1 center"><h1>Oh my Beautiful syntax</h1>
</section><section class="slide level2 center"><p>Unicode support and nice operators<sup>1</sup>:</p>
<div class="sourceCode" id="cb8"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb8-1"><a href="#cb8-1" aria-hidden="true" tabindex="-1"></a><span class="fu">neuralnetwork</span>(x, 𝐕, 𝐰, <span class="cn">φ</span>, g) <span class="op">=</span> 𝐰 <span class="op">⋅</span> <span class="fu">map</span>(𝐯ⱼ <span class="op">-></span> <span class="fu">g</span>(𝐯ⱼ <span class="op">⋅</span> <span class="fu">φ</span>(x)), 𝐕)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<aside><ol class="aside-footnotes"><li id="fn1"><p>From the <a href="https://github.com/mossr/BeautifulAlgorithms.jl/blob/master/src/neural_network_one_liner.jl">Beautiful Algorithms</a> project</p></li></ol></aside></section><section class="slide level2 center"><div class="columns">
<div class="column" style="width:50%;">
<p>R:</p>
<div class="cell" data-hash="julia-glimpse_cache/revealjs/unnamed-chunk-1_a8e155607208f04905105b141c223964">
<div class="sourceCode" id="cb9"><pre class="downlit sourceCode r code-with-copy"><code class="sourceCode R"><span><span class="fu"><a href="https://rdrr.io/r/base/MathFun.html">sqrt</a></span><span class="op">(</span><span class="fl">9</span><span class="op">)</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-stdout">
<pre><code>[1] 3</code></pre>
</div>
</div>
<div class="quarto-figure quarto-figure-center">
<figure><p><img data-src="figs/prev-twisted.jpeg"></p>
</figure>
</div>
</div><div class="column" style="width:50%;">
<p>Julia:</p>
<div class="cell" data-hash="julia-glimpse_cache/revealjs/unnamed-chunk-2_8674c14f9578362078deff3aee2c2e88">
<div class="sourceCode cell-code" id="cb11"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb11-1"><a href="#cb11-1" aria-hidden="true" tabindex="-1"></a>√<span class="fl">9</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-stdout">
<pre><code>3.0</code></pre>
</div>
</div>
<div class="quarto-figure quarto-figure-center">
<figure><p><img data-src="figs/twisted.jpeg" width="474" height="355"></p>
</figure>
</div>
</div>
</div>
</section><section class="slide level2 center"></section></section><section><section id="managing-projects" class="title-slide slide level1 center"><h1>Managing Projects</h1>
<p>The Project.toml and Manifest.toml</p>
</section><section class="slide level2 center"><p>Project.toml</p>
<pre><code>name = "GeneFinder"
uuid = "2bc6ee46-2158-4f5a-a720-91cb2d7cee64"
authors = ["Camilo García"]
version = "0.0.12"
[deps]
BioSequences = "7e6ae17a-c86d-528c-b3b9-7f778a29fe59"
BioSymbols = "3c28c6f8-a34d-59c4-9654-267d177fcfa9"
FASTX = "c2308a5c-f048-11e8-3e8a-31650f418d12"
GenomicFeatures = "899a7d2d-5c61-547b-bef9-6698a8d05446"
IterTools = "c8e1da08-722c-5040-9ed9-7db0dc04731e"
TestItemRunner = "f8b46487-2199-4994-9208-9a1283c18c0a"
TestItems = "1c621080-faea-4a02-84b6-bbd5e436b8fe"
[compat]
BioSequences = "3"
BioSymbols = "5"
FASTX = "2"
GenomicFeatures = "2"
IterTools = "1.4"
TestItemRunner = "0.2"
TestItems = "0.1"
julia = "1.8.0"
[extras]
BenchmarkTools = "6e4b80f9-dd63-53aa-95a3-0cdb28fa8baf"
Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
[targets]
test = ["Test"]</code></pre>
</section><section class="slide level2 center"><p>Manifest.toml</p>
<pre><code># This file is machine-generated - editing it directly is not advised
julia_version = "1.9.0-beta3"
manifest_format = "2.0"
project_hash = "d7e8e483246564e1b32e0aa41735942a5def23eb"
[[deps.Artifacts]]
uuid = "56f22d72-fd6d-98f1-02f0-08ddc0907c33"
[[deps.Automa]]
deps = ["Printf", "ScanByte", "TranscodingStreams"]
git-tree-sha1 = "d50976f217489ce799e366d9561d56a98a30d7fe"
uuid = "67c07d97-cdcb-5c2c-af73-a7f9c32a568b"
version = "0.8.2"
[[deps.Base64]]
uuid = "2a0f44e3-6c83-55bd-87e4-b1978d98bd5f"
[[deps.BioGenerics]]
deps = ["TranscodingStreams"]
git-tree-sha1 = "0b581906418b93231d391b5dd78831fdc2da0c82"
uuid = "47718e42-2ac5-11e9-14af-e5595289c2ea"
version = "0.1.2"</code></pre>
</section><section class="slide level2 center"></section></section><section><section id="the-multiple-dispatch" class="title-slide slide level1 center"><h1>The Multiple Dispatch</h1>
</section><section class="slide level2 center"><p>A Julia function could be created as simple as:</p>
<div class="cell" data-hash="julia-glimpse_cache/revealjs/first-func_c81f04ac98e5ce2c2824b3845d10aa33">
<div class="sourceCode cell-code" id="cb15"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb15-1"><a href="#cb15-1" aria-hidden="true" tabindex="-1"></a><span class="fu">f</span>(x) <span class="op">=</span> x<span class="op">^</span><span class="fl">2</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-stdout">
<pre><code>f (generic function with 1 method)</code></pre>
</div>
<div class="sourceCode cell-code" id="cb17"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb17-1"><a href="#cb17-1" aria-hidden="true" tabindex="-1"></a><span class="fu">f</span>(<span class="fl">2</span>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-stdout">
<pre><code>4</code></pre>
</div>
</div>
<div class="fragment">
<p>We can use the types to help the compiler infer the function:</p>
<div class="cell" data-hash="julia-glimpse_cache/revealjs/second-func_f864892c5b87092ea2fd60e621848434">
<div class="sourceCode cell-code" id="cb19"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb19-1"><a href="#cb19-1" aria-hidden="true" tabindex="-1"></a><span class="fu">f</span>(x<span class="op">::</span><span class="dt">Int64</span>) <span class="op">=</span> x<span class="op">^</span><span class="fl">2</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-stdout">
<pre><code>f (generic function with 2 methods)</code></pre>
</div>
<div class="sourceCode cell-code" id="cb21"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb21-1"><a href="#cb21-1" aria-hidden="true" tabindex="-1"></a><span class="fu">f</span>(<span class="fl">4</span>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-stdout">
<pre><code>16</code></pre>
</div>
</div>
</div>
<div class="fragment">
<p>But what if I want to use the funciton for floats?</p>
<div class="cell" data-hash="julia-glimpse_cache/revealjs/third-func_e5b7a967f2b1edb3ca8d86fa64d95c99">
<div class="sourceCode cell-code" id="cb23"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb23-1"><a href="#cb23-1" aria-hidden="true" tabindex="-1"></a><span class="fu">f</span>(x<span class="op">::</span><span class="dt">Float64</span>) <span class="op">=</span> x<span class="op">^</span><span class="fl">2</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-stdout">
<pre><code>f (generic function with 3 methods)</code></pre>
</div>
<div class="sourceCode cell-code" id="cb25"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb25-1"><a href="#cb25-1" aria-hidden="true" tabindex="-1"></a><span class="fu">f</span>(<span class="fl">2.3</span>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-stdout">
<pre><code>5.289999999999999</code></pre>
</div>
</div>
</div>
</section><section class="slide level2 center"><div class="cell" data-hash="julia-glimpse_cache/revealjs/methods_a73d8b29b17f9c2ba35afd58cc687f17">
<div class="sourceCode cell-code" id="cb27"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb27-1"><a href="#cb27-1" aria-hidden="true" tabindex="-1"></a><span class="fu">methods</span>(f)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-stdout">
<pre><code># 3 methods for generic function "f" from Main:
[1] f(x::Int64)
@ none:3
[2] f(x::Float64)
@ none:3
[3] f(x)
@ none:3</code></pre>
</div>
</div>
</section></section><section><section id="a-feature-rich-language" class="title-slide slide level1 center"><h1>A Feature Rich Language</h1>
</section><section id="ternary-operators" class="slide level2 center"><h2>Ternary operators</h2>
<p>The if-else syntax:</p>
<div class="cell" data-hash="julia-glimpse_cache/revealjs/unnamed-chunk-8_d6d972dccf041e6a4dfc46fb63683735">
<div class="sourceCode cell-code" id="cb29"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb29-1"><a href="#cb29-1" aria-hidden="true" tabindex="-1"></a><span class="cf">if</span> x <span class="op">==</span> <span class="cn">true</span></span>
<span id="cb29-2"><a href="#cb29-2" aria-hidden="true" tabindex="-1"></a> <span class="st">"great"</span></span>
<span id="cb29-3"><a href="#cb29-3" aria-hidden="true" tabindex="-1"></a><span class="cf">else</span></span>
<span id="cb29-4"><a href="#cb29-4" aria-hidden="true" tabindex="-1"></a> <span class="st">"boo"</span></span>
<span id="cb29-5"><a href="#cb29-5" aria-hidden="true" tabindex="-1"></a><span class="cf">end</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<p>Or, better… Ternary operators:</p>
<div class="fragment">
<div class="cell" data-hash="julia-glimpse_cache/revealjs/ternary-func_6e0338efcdd2510c3dff2e742e497569">
<div class="sourceCode cell-code" id="cb30"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb30-1"><a href="#cb30-1" aria-hidden="true" tabindex="-1"></a>x ? <span class="st">"great"</span> <span class="op">:</span> <span class="st">"boo"</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
</div>
</section><section id="macros" class="slide level2 center"><h2>Macros</h2>
<p>(metaprogrmming: code that transforms code)</p>
<div class="sourceCode" id="cb31"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb31-1"><a href="#cb31-1" aria-hidden="true" tabindex="-1"></a><span class="pp">@time</span> <span class="fu">f</span>(<span class="fl">10</span><span class="op">^</span><span class="fl">6</span>)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</section><section class="slide level2 center"><p>Here is an example of how to create one<sup>1</sup></p>
<div class="cell" data-hash="julia-glimpse_cache/revealjs/macro-creation_a74a1b4db78aa1d825a258b28bb41174">
<div class="sourceCode cell-code" id="cb32"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb32-1"><a href="#cb32-1" aria-hidden="true" tabindex="-1"></a><span class="kw">macro</span> <span class="fu">sayhello</span>(name)</span>
<span id="cb32-2"><a href="#cb32-2" aria-hidden="true" tabindex="-1"></a> <span class="cf">return</span> <span class="op">:</span>( <span class="fu">println</span>(<span class="st">"Hello, "</span>, <span class="op">$</span>name) )</span>
<span id="cb32-3"><a href="#cb32-3" aria-hidden="true" tabindex="-1"></a><span class="kw">end</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-stdout">
<pre><code>@sayhello (macro with 1 method)</code></pre>
</div>
</div>
<div class="fragment">
<div class="cell" data-hash="julia-glimpse_cache/revealjs/macro-execution_285d4adef9f80c7e09664c721ac628e7">
<div class="sourceCode cell-code" id="cb34"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb34-1"><a href="#cb34-1" aria-hidden="true" tabindex="-1"></a><span class="pp">@sayhello</span> <span class="st">"reader"</span> </span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-stdout">
<pre><code>Hello, reader</code></pre>
</div>
</div>
</div>
<aside><ol class="aside-footnotes"><li id="fn2"><p>Taken from Patrick’s <a href="https://www.paltmeyer.com/blog/posts/meta-programming/#macros">blog post</a></p></li></ol></aside></section><section id="fine-grain-debugging3" class="slide level2 center"><h2>Fine-grain debugging<sup>1</sup>
</h2>
<p>Return Julia’s intermediate representation (IR) of the function:</p>
<div class="sourceCode" id="cb36"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb36-1"><a href="#cb36-1" aria-hidden="true" tabindex="-1"></a><span class="pp">@code_lowered</span> </span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="fragment">
<p>Reports Julia’s type inference on the IR</p>
<div class="sourceCode" id="cb37"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb37-1"><a href="#cb37-1" aria-hidden="true" tabindex="-1"></a><span class="pp">@code_typed</span> </span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<div class="fragment">
<p>Shows the LLVM IR generated by Julia</p>
<div class="sourceCode" id="cb38"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb38-1"><a href="#cb38-1" aria-hidden="true" tabindex="-1"></a><span class="pp">@code_llvm</span> </span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<div class="fragment">
<p>Show the native assembly function code</p>
<div class="sourceCode" id="cb39"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb39-1"><a href="#cb39-1" aria-hidden="true" tabindex="-1"></a><span class="pp">@code_native</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<aside><ol class="aside-footnotes"><li id="fn3"><p>This example was taken from <a href="https://viralinstruction.com/posts/goodjulia/#its_both_fast_and_dynamic">What’s great about Julia</a> from <a href="https://github.com/jakobnissen">Jakob Nybo</a></p></li></ol></aside></section><section id="out-of-the-box-parallelism4" class="slide level2 center"><h2>Out-of-the-box parallelism<sup>1</sup>
</h2>
<div class="cell" data-hash="julia-glimpse_cache/revealjs/unnamed-chunk-12_da96615776d3a564bcac1bb4a6bc4738">
<div class="sourceCode cell-code" id="cb40"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb40-1"><a href="#cb40-1" aria-hidden="true" tabindex="-1"></a><span class="im">using</span> <span class="bu">Base.Threads</span></span>
<span id="cb40-2"><a href="#cb40-2" aria-hidden="true" tabindex="-1"></a><span class="pp">@threads</span> <span class="cf">for</span> i <span class="kw">in</span> <span class="fl">1</span><span class="op">:</span><span class="fl">16</span></span>
<span id="cb40-3"><a href="#cb40-3" aria-hidden="true" tabindex="-1"></a> <span class="fu">print</span>(i, <span class="ch">','</span>) <span class="co"># IO is thread-safe</span></span>
<span id="cb40-4"><a href="#cb40-4" aria-hidden="true" tabindex="-1"></a><span class="cf">end</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
<div class="cell-output cell-output-stdout">
<pre><code>1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,</code></pre>
</div>
</div>
<aside><ol class="aside-footnotes"><li id="fn4"><p>Taken from <a href="https://viralinstruction.com/posts/goodjulia/#its_both_fast_and_dynamic">What’s great about Julia</a> from <a href="https://github.com/jakobnissen">Jakob Nybo</a></p></li></ol></aside></section></section><section><section id="a-rich-ecosystem" class="title-slide slide level1 center"><h1>A Rich Ecosystem</h1>
</section><section class="slide level2 center">
<img data-src="figs/julia-packages-ci.png" class="r-stretch quarto-figure-center"><p class="caption">The Nanosoldier Report</p></section><section id="differential-equations" class="slide level2 center"><h2>Differential Equations</h2>
<div class="cell" data-hash="julia-glimpse_cache/revealjs/unnamed-chunk-13_9280342d2a735dfaae836aa2898a8897">
<div class="sourceCode cell-code" id="cb42"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb42-1"><a href="#cb42-1" aria-hidden="true" tabindex="-1"></a><span class="kw">function</span> <span class="fu">lorenz!</span>(du,u,p,t)</span>
<span id="cb42-2"><a href="#cb42-2" aria-hidden="true" tabindex="-1"></a> du[<span class="fl">1</span>] <span class="op">=</span> <span class="fl">10.0</span><span class="fu">*</span>(u[<span class="fl">2</span>]<span class="op">-</span>u[<span class="fl">1</span>])</span>
<span id="cb42-3"><a href="#cb42-3" aria-hidden="true" tabindex="-1"></a> du[<span class="fl">2</span>] <span class="op">=</span> u[<span class="fl">1</span>]<span class="fu">*</span>(<span class="fl">28.0</span><span class="op">-</span>u[<span class="fl">3</span>]) <span class="op">-</span> u[<span class="fl">2</span>]</span>
<span id="cb42-4"><a href="#cb42-4" aria-hidden="true" tabindex="-1"></a> du[<span class="fl">3</span>] <span class="op">=</span> u[<span class="fl">1</span>]<span class="op">*</span>u[<span class="fl">2</span>] <span class="op">-</span> (<span class="fl">8</span><span class="op">/</span><span class="fl">3</span>)<span class="op">*</span>u[<span class="fl">3</span>]</span>
<span id="cb42-5"><a href="#cb42-5" aria-hidden="true" tabindex="-1"></a><span class="kw">end</span></span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<pre><code>lorenz! (generic function with 1 method)</code></pre>
</section><section class="slide level2 center"><p>Now let’s solved:</p>
<div class="cell" data-hash="julia-glimpse_cache/revealjs/unnamed-chunk-14_61f8ccd664cce1bb228f0d2995534aa8">
<div class="sourceCode cell-code" id="cb44"><pre class="sourceCode julia code-with-copy"><code class="sourceCode julia"><span id="cb44-1"><a href="#cb44-1" aria-hidden="true" tabindex="-1"></a><span class="im">using</span> <span class="bu">DifferentialEquations</span></span>
<span id="cb44-2"><a href="#cb44-2" aria-hidden="true" tabindex="-1"></a>u0 <span class="op">=</span> [<span class="fl">1.0</span>;<span class="fl">0.0</span>;<span class="fl">0.0</span>]</span>
<span id="cb44-3"><a href="#cb44-3" aria-hidden="true" tabindex="-1"></a>tspan <span class="op">=</span> (<span class="fl">0.0</span>,<span class="fl">100.0</span>)</span>
<span id="cb44-4"><a href="#cb44-4" aria-hidden="true" tabindex="-1"></a>prob <span class="op">=</span> <span class="fu">ODEProblem</span>(lorenz!,u0,tspan)</span>
<span id="cb44-5"><a href="#cb44-5" aria-hidden="true" tabindex="-1"></a>sol <span class="op">=</span> <span class="fu">solve</span>(prob)</span></code><button title="Copy to Clipboard" class="code-copy-button"><i class="bi"></i></button></pre></div>
</div>
<pre><code>retcode: Success
Interpolation: specialized 4th order "free" interpolation, specialized 2nd order "free" stiffness-aware interpolation
t: 1263-element Vector{Float64}:
0.0
3.5678604836301404e-5
0.0003924646531993154
0.0032624077544510573
0.009058075635317072
0.01695646895607931
0.02768995855685593
0.04185635042021763
0.06024041165841079
0.08368541255159562
⋮
99.30760258626904
99.39665422328268
99.49536147459878
99.58822928767293
99.68983993598462
99.77864535713971
99.85744078539504
99.93773320913628
100.0
u: 1263-element Vector{Vector{Float64}}:
[1.0, 0.0, 0.0]
[0.9996434557625105, 0.0009988049817849058, 1.781434788799208e-8]
[0.9961045497425811, 0.010965399721242457, 2.146955365838907e-6]
[0.9693591634199452, 0.08977060667778931, 0.0001438018342266937]
[0.9242043615038835, 0.24228912482984957, 0.0010461623302512404]
[0.8800455868998046, 0.43873645009348244, 0.0034242593451028745]
[0.8483309847495312, 0.6915629321083602, 0.008487624590227805]
[0.8495036669651213, 1.0145426355349096, 0.01821208962127994]
[0.9139069574560097, 1.4425599806525806, 0.03669382197085303]
[1.088863826836895, 2.052326595543049, 0.0740257368585531]
⋮
[4.669609096878053, 3.061564434452441, 25.1424735017959]
[4.188801916573263, 4.617474401440693, 21.09864175382292]
[5.559603854699961, 7.905631612648314, 18.79323210016923]
[8.556629716266505, 12.533041060088328, 20.6623639692711]
[12.280585075547771, 14.505154761545633, 29.332088452699942]
[11.736883151600804, 8.279294641640229, 34.68007510231878]
[8.10973327066804, 3.2495066495235854, 31.97052076740117]
[4.958629886040755, 2.194919965065022, 26.948439650907677]
[3.8020065515435855, 2.787021797920187, 23.420567509786622]</code></pre>
</section><section class="slide level2 center">
<!-- ## Data Science -->
<!-- ## Plotting libraries -->
<!-- ## Biology -->
<img data-src="figs/lorenz.png" width="700" class="r-stretch quarto-figure-center"><p class="caption">The Lorenz attractor</p></section></section><section id="and-many-others" class="title-slide slide level1 center"><h1>And many others…</h1>
<ul>
<li>
<a href="https://github.com/JuliaData/DataFrames.jl">DataFrames.jl</a> and <a href="https://github.com/kdpsingh/Tidier.jl">Tidier.jl</a>
</li>
<li><a href="https://github.com/MakieOrg/Makie.jl">Makie.jl</a></li>
<li>
<a href="https://github.com/BioJulia/BioSequences.jl">BioSequences.jl</a> (and the entire <a href="https://github.com/BioJulia">BioJulia</a> ecosystem)</li>
<li><a href="https://github.com/SciML">SciML</a></li>
<li>
<a href="https://github.com/GenieFramework/Genie.jl">Genie.jl</a> (web apps)</li>
<li>
<a href="https://github.com/fonsp/Pluto.jl">Pluto.jl</a> (interactive notebooks)</li>
</ul>
<!-- # Some developer's tools --><!-- ## Vscode plugin --><!-- ## Creating a package --><!-- ## Documentation --><!-- docstrings --><!-- ## Testing --></section><section><section id="a-supportive-community" class="title-slide slide level1 center"><h1>A Supportive Community</h1>
</section><section id="a-short-story" class="slide level2 center"><h2>A short story…</h2>
<img data-src="figs/vshah-slack.png" class="r-stretch"></section><section class="slide level2 center"><div class="quarto-figure quarto-figure-center">
<figure><p><img data-src="figs/Jlsyntax.png"></p>
</figure>
</div>
<p><img data-src="figs/Jlsyntax.png"></p>
</section><section class="slide level2 center">
<img data-src="figs/last-jlsyntax.png" class="r-stretch quarto-figure-center"></section><section id="other-talks" class="slide level2 center"><h2>Other talks</h2>
<p>This talk was heavily influenced by <a href="https://viralinstruction.com/posts/goodjulia/#its_both_fast_and_dynamic">What’s great about Julia</a> from <a href="https://github.com/jakobnissen">Jakob Nybo</a>, and <a href="https://github.com/johnfgibson/whyjulia">Why Julia?</a> presentation as well. I also recommend this Discourse thread about Why is <a href="https://discourse.julialang.org/t/why-is-julia-so-great/94718">Julia so great?</a> that summarizes many other talks and resources.</p>
</section><section id="join-the-community" class="slide level2 center"><h2>Join the community!</h2>
<p><a href="https://discourse.julialang.org">Discourse</a></p>
<p><a href="https://julialang.org/slack/">Slack</a></p>
<p><a href="https://github.com/JuliaLang/julia">Julia on Github</a></p>
<div class="footer footer-default">
<p>A glimpse into The Julia Language</p>
</div>
</section></section>
</div>
</div>
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